ricardofg
Posts: 581
Joined: Wed Feb 23, 2005 4:09 am

A380 & Emergency Landings

Fri Jun 17, 2005 7:46 am

In the unthinkable, yet enevitable event that an A380 will have to make a quick emergency landing for whatever reason, how are certain airports who cannot support the a380 for many reasons especially runway length going to deal, and how safe will it be to have to divert much further for the passengers on board?

Rgds from MP at YYZ!
 
Glom
Posts: 2051
Joined: Sat Apr 23, 2005 2:38 am

RE: A380 & Emergency Landings

Fri Jun 17, 2005 7:50 am

It's quad so it'll be okay.
 
kl911
Posts: 3979
Joined: Mon Jul 21, 2003 1:10 am

RE: A380 & Emergency Landings

Fri Jun 17, 2005 7:51 am

Quoting RicardoFG (Thread starter):
In the unthinkable, yet enevitable event that an A380 will have to make a quick emergency landing for whatever reason, how are certain airports who cannot support the a380 for many reasons especially runway length going to deal, and how safe will it be to have to divert much further for the passengers on board?

Rgds from MP at YYZ!

It has been said before, the A380 uses LESS runway then the 747. Taxiways and gates are problems, but you don't need those in case or a real emergency.

KL911
 
Newark777
Posts: 8284
Joined: Thu Dec 02, 2004 6:23 am

RE: A380 & Emergency Landings

Fri Jun 17, 2005 7:52 am

I'm pretty sure it can be handled by many of the same airports that handle the 747, but taxiway width is the real big problem. Of course, in an emergency, you don't worry about the taxiways, and just get it on the ground. If it has any problems finding diversion airports, it would probably be some of the same problems the 747 has.

Harry
Why grab a Heine when you can grab a Busch?
 
birdbrainz
Posts: 423
Joined: Fri May 27, 2005 6:57 am

RE: A380 & Emergency Landings

Fri Jun 17, 2005 8:24 am

Speaking of runway required, how does the 380 achieve it's landing (and rejected take-off) performance with thrust reversers on the inboard engines only? Or am I mistaken and it has them on all four? I'd expect it to be compromised.
A good landing is one you can walk away from. A great landing is if the aircraft can be flown again.
 
Newark777
Posts: 8284
Joined: Thu Dec 02, 2004 6:23 am

RE: A380 & Emergency Landings

Fri Jun 17, 2005 9:19 am

Speaking of runway required, how does the 380 achieve it's landing (and rejected take-off) performance with thrust reversers on the inboard engines only? Or am I mistaken and it has them on all four? I'd expect it to be compromised.

On any airliner, the thrust reversers are not considered when deciding required runway length for landing. It is just thought of as extra, and is not part of the calculation.

Harry
Why grab a Heine when you can grab a Busch?
 
RedDragon
Posts: 1096
Joined: Sat Jul 03, 2004 2:24 am

RE: A380 & Emergency Landings

Fri Jun 17, 2005 11:10 am

...And to confirm, reversers are indeed fitted to the inboard engines only. (Outboard reversers have been omitted due to FOD concerns, given that the engines will overhang the taxiway edge.)

Rich
 
Ken777
Posts: 9024
Joined: Thu Mar 11, 2004 5:39 am

RE: A380 & Emergency Landings

Fri Jun 17, 2005 11:23 am

Medical emergencies will probably be the most frequent reason for an emergency landing and in these situations the pilot will be looking for the closest airport where medical facilities are available. A gate is very nice for this situation, but it can be handled without one.

The one time I was on a flight that made an emergency landing because of the plane was a QF 747 SYD-LAX via Fiji that immediately returned to SYD with no chance to dump fuel. Fortunately this was due to a faulty warning light for fire in #3 (and they did punch the bottle). This does raise the issue of a maxed out l3800 doing the same thing without time to dump fuel. I have no doubt that Airbus engineers have addressed this situation so it can be done safely.

For the 380 the real test will be if there is a need to carry out an emergency evacuation (and there probably will be a few over the life of the plane) and how well this is carried out with average pax.
 
4xRuv
Posts: 379
Joined: Sat Dec 06, 2003 10:05 pm

RE: A380 & Emergency Landings

Fri Jun 17, 2005 10:52 pm

I remember reading on a thread here a couple of month ago, that when the emergency slides were tested, some people who slide from the second level (floor is for a buildings isn't it), broke their legs, or twisted their ankle
Does anybody know if this has really happened, and if so, how (or if) did they solve this issue?
 
RichardPrice
Posts: 4474
Joined: Sat Apr 23, 2005 5:12 am

RE: A380 & Emergency Landings

Fri Jun 17, 2005 11:06 pm

Quoting Birdbrainz (Reply 4):
Speaking of runway required, how does the 380 achieve it's landing (and rejected take-off) performance with thrust reversers on the inboard engines only? Or am I mistaken and it has them on all four? I'd expect it to be compromised.

The A380 has more wheels than the 747 and thus it has more brakes and it has a lower approach speed. The larger mass generally helps it as well. Plus the engines are more powerful.

Quoting 4xRuv (Reply 8):
I remember reading on a thread here a couple of month ago, that when the emergency slides were tested, some people who slide from the second level (floor is for a buildings isn't it), broke their legs, or twisted their ankle

I didnt hear anything like that about the A380 slides, but I do know of injuries occuring from evacs of the upper deck of the 747 - pretty much exactly what you describe. Concorde was also prone to this.
 
flyAUA
Posts: 4287
Joined: Wed May 25, 2005 3:12 am

RE: A380 & Emergency Landings

Fri Jun 17, 2005 11:25 pm

Quoting 4xRuv (Reply 8):
I remember reading on a thread here a couple of month ago, that when the emergency slides were tested, some people who slide from the second level (floor is for a buildings isn't it), broke their legs, or twisted their ankle
Does anybody know if this has really happened, and if so, how (or if) did they solve this issue?

All a.net speculation... don't worry  Wink

The slides have a lower gradient closer to the bottom. The friction force (there was also a nice thread about synthetic clothes and emergency slides Big grin) will make sure you don't get off the slide with a too high velocity. Everything has been accounted for. The people who make emergency slides are not amateurs  Smile
Not drinking, also isn't a solution!
 
ZRH
Posts: 4371
Joined: Tue Nov 16, 1999 11:32 pm

RE: A380 & Emergency Landings

Sat Jun 18, 2005 12:03 am

Quoting RicardoFG (Thread starter):
especially runway length going to deal

As said, the 380 needs less runway lenght than the 747. For that at any airport where a 747, 777 or 340 can land, a 380 can land to.
 
AMSSFO
Posts: 912
Joined: Wed Feb 02, 2005 8:42 am

RE: A380 & Emergency Landings

Sat Jun 18, 2005 12:52 am

Quoting 4xRuv (Reply 8):
I remember reading on a thread here a couple of month ago, that when the emergency slides were tested, some people who slide from the second level (floor is for a buildings isn't it), broke their legs, or twisted their ankle
Does anybody know if this has really happened, and if so, how (or if) did they solve this issue?

This MIGHT happen when they do the test THIS summer....
What you read where expectations/wishes of some people on this forum.
It will work out well.
 
RichardPrice
Posts: 4474
Joined: Sat Apr 23, 2005 5:12 am

RE: A380 & Emergency Landings

Sat Jun 18, 2005 1:00 am

Quoting AMSSFO (Reply 12):
This MIGHT happen when they do the test THIS summer....
What you read where expectations/wishes of some people on this forum.
It will work out well.

I thought the A380 rating tests had already been done, and that included evacing the aircraft with slides?
 
lorm
Posts: 377
Joined: Sun Jun 06, 2004 4:31 am

RE: A380 & Emergency Landings

Sat Jun 18, 2005 7:05 am

Quoting RichardPrice (Reply 9):

The A380 has more wheels than the 747 and thus it has more brakes and it has a lower approach speed. The larger mass generally helps it as well. Plus the engines are more powerful.

According to photos taken by A.Net photographers, and looking at two press photos that were released on the Airbus.com website it appears the A380 has the same number of wheels that are equipped with brakes as the 747.

Like the 747 the A380 employs a similar main landing gear configuration, with a two axle wing gear truck, and two body gear systems mounted aft of the wing gears.

BUT the A380's body gear system has a 3 axle bogie like the 777 and Tu-154. The difference is if you look carefully at the pictures, you will notice that the aft 3rd axle of the body gear truck does not have the disc brake pucks, pistons, pads, and the brake fans mounted on the hubs.

Here's the pictures taken directly off of the Airbus A380 website looking into the main body gear bay. Note the forward direction in these pictures is to the right of each picture. Looking at the far left of the pictures you don't see the brake discs (large round black cylinders), and the brake pistons like the other 2 axles have.

It looks like also what appears to be that the third axle also has a steering system hydraulic piston mounted to the topside of the bogie, which would explain the pivot (the white circle) and not being mounted to that silver brace that attaches to both forward axle brakes.



Airbus has a habit of putting brake fans on their demonstrators. You can see the brake fans mounted inside the hubs as the silver discs. Note the absence of the brake fan on the most aft axle on the body gear.


View Large View Medium
Click here for bigger photo!

Photo © French Frogs AirSlides
View Large View Medium
Click here for bigger photo!

Photo © Marlo Plate - Iberian Spotters



View Large View Medium
Click here for bigger photo!

Photo © Fabrice Sanchez - Brussels Aviation Photography



I'm wondering if this is just for the demonstrator that the 3rd axle isn't equipped with brakes or if the production versions will include brakes. Boeing's similar 3 axle bogie on the 777 has 3rd axle steering and brakes.
Brick Windows
 
sidewinder
Posts: 182
Joined: Sat Jun 11, 2005 10:15 am

RE: A380 & Emergency Landings

Sat Jun 18, 2005 7:35 am

Quoting RichardPrice (Reply 9):
The A380 has more wheels than the 747 and thus it has more brakes and it has a lower approach speed. The larger mass generally helps it as well. Plus the engines are more powerful.

Does anyone know the v-speeds yet? Or at least Vso
"I don't think I will ever get over Macho Grande"
 
OldAeroGuy
Posts: 3185
Joined: Sun Dec 05, 2004 6:50 am

RE: A380 & Emergency Landings

Sat Jun 18, 2005 9:59 am

Quoting Newark777 (Reply 5):
On any airliner, the thrust reversers are not considered when deciding required runway length for landing. It is just thought of as extra, and is not part of the calculation.

True, but reverse thrust can come in mighty handy when landing on icy runways.
Airplane design is easy, the difficulty is getting them to fly - Barnes Wallis

Who is online

Users browsing this forum: b377, Baidu [Spider], ChristopherS, Google Adsense [Bot], heyjc99, justplanesmart, kimshep, MKEdude, msycajun, ooslc, smi0006, tcaeyx and 203 guests